Hoisting apparatus.



I PATEN'TED JAN. 3, 1905. M. GREEN. HQISTING APPARATUS. APPLIGATIOH IIL ED JULY 29, 1904. I

2 SHEETS-SHEET l.

- Inventor:

fittorney.

PATENTED JAN. 3, 1905.

I A. M. GREEN.

HOISTING APPARATUS.

APPLICATION FILED JULY 29, 1904.

2 SHEETS-SHEET 2 Fig. '9 F139. /0.

witnesses.- I Invent? 7':

- Edi 79,275.

UNITED STATES Patented January 3, 1805.

PATENT OFFICE.

. ONE-HALF TQ FRANK A. Mans on, or WINTHROP, nassacnosnrrs.

,HOISUNG APPARATUS.

SPEGEFICATION forming part of Letters Patent No. 779,275, dated January 3;,1905.

- Application filed July 29 1904. Serial'No. 218,677.

To all whom it may concern:

Be it known that I, ARCHIBALD M. GREEN,.

of Chelseain the county'of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Hoisting Apparatus, of which the following is a'specification.

This invention relates to hoistinga'pparatus. and is especially intended for application to hoisting-buckets, or coal diggers, as they are sometimes termed, of the divided or clam shell variety for loading or unloading coal to and from vessels.

'As usually constructedheretofore the opening and closing chain or rope by which the bucket is opened and closed runs through a guide-opening formed in the, head which is sometimes provided With a detachable wearplate orfalr-lead formed with an eye to take the wear from the eye in the head.

In none of the forms of construction heretofore employed, so far as I am aware,-l*:s

there been used any form of 'antifriction tim 'v1ce to lessen the wear on the rope or chain where it passes through the guide. Thedetachable plate does not reduce the wear on the rope. It merely takes the wear from the head or relieves the wear on the head and is cheaper to replace than to put in an entire new head; but -it does not relieve the wear on the rope itself. rope or wire, entailing great expense for frequent renewal. snap than is a wire rope, and it ismore kinky and not so desirable for use.

The main object of the present invention, is to provide an antifriction device or fair-lead for the rope which shall reduce the friction to a minimum, and thereby render it capable of use for a long time. There'are other features of the invention relating to the guides.

-. The invention will now bexfully described, reference being made to the accompanying drawings, and the novel features thereof will be particularly pointed out in the claims at the close of the specification.

In the drawings, Figure '1 is a plan of a hoisting b'ucket embodying the invention. Fig. 2 is a. side elevation. Fig. 3 is afront elevation. 4: is an enlarged detail plan The efi'ect is to rapidly wear out the A chain is more likely to,

.Fig. 6. Fig. 8 is an enlarged detail front elevation of the heathand sheaves for the openmg andclosing rope and showing theguards between the earsof the head and the sheaves and also between the sheaves themselves.- Fig.

9 is a detail plan of a portion of the weight, showing the slot and shea es and guide-plates. Fig. 10 a detail side elevation of one of the sheaves and guards. Fig, 11is a plan of Fig. 10. Fig. 12 is a section through the head on line 12 12 of Fig. 8.

The two shells 1 2, which form the bucket, are connected with the head 3 by the links A, which are pivotally connected at the ends both with the bucket and the head, as well known. The two shells 1 2 arefconnected together by the pivot-shaft 5. The holding-rope 6 is connected with the head also in well-known The outer shell or casing-'13 of the fair-lead is formed with a lower portion 13 of less eX- teriordiamcter than the upper portion and preferably tapering and is inserted as a sort of bushing in the guide 1-1, which is a part of the head 3. The shell is formed with a shoulder 15, which rests on the upper end of the guide 14.-

Inside of the casing are three double-grooved 11-0115 16 16 16. together forming a triangle A tubular shell 1?, inside of the casing 13', is formed with'three recesses in whose sides the said rolls 16 are jourmiledf The rolls are placed in a triangular position as nearly together as possible without interfering Willi each other, each groove in the rolls forming together with the adjacent groove in the ad 5mm; roil, substantially a semicircle, thus forming a central circular recesses. The wire or rope 7 passes through this central passage, and as it sways from side to side it swings into one or the other of these three recesses and rubs against the two grooves of the: adjacent rolls forming, the recess. The size of the grooves should be proportioned to the size of the opening and closingrope -7, sothat the recess formed by two adjacent rolls will be of right size to receive the rope without being too large. The

- guide-plates 18 18. one on each side of the slot in the weight in which the sheaves are journaled. These, guide-plates are formed with notches 19, one for each'sheave, and are secured to:

- the upper side of the walls of the slot.v

Sometimes the opening and closing rope 7 4 has a tendencyto jump oh oi the sheaves 8 or terference.

to jump from one to the otherand cause inlln order to prevent this, I place guards 20 at the outer ends of the sheaves between the sheaves and the depending ears of the head 3 and also between the sheaves.- In

order to do this, ll cut away the rim or form a hub 21 on each side of the sheaves to form shoulders on which the arc-shaped guards 20' will rest. 'lheguard is forniedwith two fingers 22 22, which extend upwardly and em brace the head 3 between ing with the sheave.

As illustrated, the two hubs 2 1, which are adjacent to each other, form together a shou'lderof double the width of the shoulder on the outer ends, and therefore the middle guard20 will be ofdoublethe thickness of 'theo'uter guards, although, if preferred, the hubs could be made shorter on the inner side than on-the outer, so that the two adjacent hubs taken together would be equal to one of the outer.

The holes 24: in the outer casing 13' of the fair-lead are for convenience of inserting in position the shafts 23, on which the. grooved rolls 16 are mounted.

What I claim is,

1. Ahoisting-bucketriaving a fair-lead prm I A vided w'itha plurality. of double-grooved rolls pivoted with such relation toeach other as to v'otedtogether, ahead, pivotal connections beform a central passage with a plurality or are- ,shaped bearings. for the rope, each groove of each roll cooperating with the adjacent groove of the adjacent roll so that the two will ,lzorm '1 together an antifriction-bearing,

2. A- ,fair-lead for a rope having a plurality" of'doublegrooved rolls pivoted with such an v gular relation to each other as to form a central passage with a pluralityfefarc-shaped re-- cesses, each groove of each roll cooperating with the ad acent groove of the next ad acent passage with three semi-j them, so that as the :4 sheaves revolve the guards are held from turnv'vaavs roll so that the said two adjacent grooves together form a roller-bearing for the rope.

3; A fair-lead fora rope'having three double grooved rolls pivoted i fa triangular position forming a central passage, each groove-formi-ng together with the adjacent groove of the contiguous roll a semicircular recess and thus forming three semicircular roller-bearings each of which ihcludes two of the rolls.

' 4:."A fairelead for arope having a tubular shell, three double-grooved rolls, bearings within said shell in whichsaid rolls are pivoted in a triangular position forming a central passage between them, each groove of each roll forming together with the adjacent groove of the next adjacent roll a semicircular recess and thus forming three semicircular roller-bearings each of which includes two of the rolls.

5. A, hoisting-hucket having .two shells pivoted together, a head, pivotal connections between the shells and head, anopeni'ng and clossheaves for said rope carried by said ing rope, shells and by said head, and a fair-lead for said rope carried by-the head, said fair-lead comprising an eye, a plurality of doublegrooved rolls, bearings" within said eye in which said rolls are pivoted in angular relation to'each other forming a central passage between them, the grooves at the end of each roll forming together with the adjacent grooves of the adjacent rolls a series of arcshaped recesses and thus formlng a series of arc-shaped roller-bearings.

'oted together, a slotted weight carried by the pivot-shaft, a plurality of sheaves pivoted in 6. A hoisting-bucket having two shells pivv the slot in said weight, an opening-and closing rope which passes around said sheaves, and notched guide-plates secured to opposite sides of said slot having notches which receive thesheaves. Q j

'7. A hoistingebucket having two shells pivoted together, ahead, pivotal connections between the shells and head, an opening and closing rope, sheaves for said rope carried by said shells and sheaves carried by said head, the

sheaves for-the head being ,formed with projecting hubs, and'guards having arc-shaped sides which engage the head and prevent rotation of the said guards with the sheaves.

' opening and closiuggrope, sheaves IfOI" ,said,

lower sides which rest on the hubs and up,- madly-extending projections on the. upper x 8., l A hoisting bucket having twov shells pivl i m e pivoted in the slot in said weight, guide 1 plates secured to oppositesidesiofi'said slot 'having'notches to-receive'the-sheaves, sheaves carried by'sa'id head, formed with projecting hubs, guards having arc-shaped lower sidesi which rest on-the hubs andupwardly-ex'tending; projections on theupperfsides which (an- 139 gage the head and preventrotation of said said two adjacent grooves form together a 1 guards with the sheaves, and a fair-lead 0n roller-hearing for the rope.

the head -for the opening and closing rope, In testimonywhereoflafiix my signature in said fair-lead having a plurality of doublepresence of two witnesses groove-d rolls pivoted with angular relation to each other and forming a central passage with I I ARCHIBALD GREEN a plurality of arc-shaped recesses, each groove Witnesses: of each roll cooperating with the nextadja- WILLIAM A. COPELAND,

cent groove of the adjacent roll so that the ROBERT WALLACE. 

